1. 1 Auteuil, Paris March 2011 Jefferson Lab The 12 GeV Era Hugh Montgomery

2. 2 Outline 12 GeV Upgrade Project Schedule 12 GeV Physics Agenda 12 GeV Upgrade Hardware Conclusion

3. 3 12 GeV Upgrade Schedule Two short parasitic installation periods in FY10 6-month installation May – Oct 2011 12-month installation May 2012 – May 2013 Hall A commissioning start October 2013 Hall D commissioning start April 2014 Halls B/C commissioning start October 2014 Project Completion June 2015

4. 4 12 GeV Upgrade Enhanced capabilities in existing Halls New Hall CHL-2 Maintain capability to deliver lower pass beam energies

5. 5 Hall D Glue Electron Beam from CEBAF Lead Glass Detector Solenoid Coherent Bremsstrahlung Photon Beam Cerenkov Counter (descoped) Time of Flight Barrel Calorimeter Note that tagger is 80 m upstream of detector Target Central Drift Chambers (CDC) Forward Drift Chambers (FDC) 

6. 6 HTCC CTOF Silicon Tracker PCAL FTOF Drift Chambers R1, R2, R3 CLAS12

7. 7 New Super High Momentum Spectrometer (SHMS) Horiz. Bender, 3 Quads + Dipole P →11 GeV/c dP/P 0.5 –1.0x10 -3 Acceptance: 5msr, 30% 5.5°< θ< 40° High Momentum Spectrometer (HMS) P →7.5 GeV/c  P/P = 0.5 –1.0x10 -3 Acceptance: 6.5msr, 18% 10.5°< θ< 90° Minimum opening angle: 17°

8. 8 Super Bigbite Spectrometer (SBS) in Hall A Scattering chamber Vacuum snout Magnetic shield First tracker Second tracker Hadron calorimeter Beam line Pb shield 48D48 magnet Third tracker CH2 analyzer Beam MIE Funding schedule under discussion with DOE

9. 9 H1, ZEUS JLab Upgrade 11 GeV H1, ZEUS JLab @ 12 GeV 11 GeV 27 GeV 200 GeV W = 2 GeV Study of high x B domain requires high luminosity 0.7 HERMES COMPASS The 12 GeV Upgrade is well matched to studies in the valence quark regime.

10. 10 12 GeV Physics seen by the Physics Advisory Committee The Hadron spectra as probes of QCD (GlueX and heavy baryon and meson spectroscopy) The transverse structure of the hadrons (Elastic and transition Form Factors) The longitudinal structure of the hadrons (Unpolarized and polarized parton distribution functions) The 3-D structure of the hadrons (Generalized Parton Distributions and Transverse Momentum Distributions) Hadrons and cold nuclear matter (Medium modification of the nucleons, quark hadronization, N-N correlations, hypernuclear spectroscopy, few-body experiments) Low-energy tests of the Standard Model and Fundamental Symmetries (Møller, PVDIS, PRIMEX, …..)

11. 11 12 GeV Approved Experiments by Physics Topics TopicHall AHall BHall CHall DTotal The Hadron spectra as probes of QCD (rated) (GlueX and heavy baryon and meson spectroscopy) 1 1 2 The transverse structure of the hadrons (rated) (Elastic and transition Form Factors)423 9 The longitudinal structure of the hadrons (rated) (Unpolarized and polarized parton distribution functions)224 8 The 3D structure of the hadrons (unrated) (Generalized Parton Distributions and Transverse Momentum Distributions)384 15 Hadrons and cold nuclear matter (rated) (Medium modification of the nucleons, quark hadronization, N-N correlations, hypernuclear spectroscopy, few-body experiments)125 8 Low-energy tests of the Standard Model and Fundamental Symmetries (rated at PAC 37)2 1 3 TOTAL121516245 Current PAC approved experiments represent over 6 years of running at 35 weeks/year and Hall multiplicity of 2.9

12. 12 QCD and confinement Large Distance Low Energy Small Distance High Energy Perturbative QCD Strong QCD High Energy Scattering Gluon Jets Observed Spectroscopy Gluonic Degrees of Freedom Missing

13. 13 Hybrid mesons Normal mesons 1 GeV mass difference Hybrid mesons and mass predictions J pc = 1 -+ q q q q Lattice 1 -+ 1.9 GeV 2 +- 2.1 GeV 0 +- 2.3 GeV Lowest mass expected to be  1 (1 −+ ) at 1.9±0.2 GeV

14. 14 Measuring High-x Structure Functions REQUIRES: High beam polarization High electron current High target polarization Large solid angle spectrometers 12 GeV will access the regime (x > 0.3), where valence quarks dominate

15. 15 Generalized Parton Distributions (GPDs) Proton form factors, transverse charge & current densities Structure functions, quark longitudinal momentum & helicity distributions X. Ji, D. Mueller, A. Radyushkin (1994-1997 ) Correlated quark momentum and helicity distributions in transverse space – GPDs, TMDs

16. 16 The Nucleus : The EMC Effect 19822009 EMC Effect ObservedOrigins Still Obscure Local Density Effect? 16

17. 17 Nucleon-Nucleon Short Range Correlations Strong multi-nucleon component indicating short range correlations p-n dominates Plateaux x>1 scale with EMC slope 0.35<x Bj <0.7 Experiment from Jefferson Lab Graphics from CERN Courier Short Range Correlations and EMC Effect have common origin???

18. 18 All Data & Fits Plotted at 1 σ HAPPEx: H, He G 0 : H, PVA4: H SAMPLE: H, D Isovector weak charge Isoscalar weak charge Standard Model Prediction Weak Couplings Q-weak expected precision

19. 19 Møller & Deep Inelastic Scattering Parity Violation SoLID: general purpose deep inelastic parity violating experiment with solenoid Broad scope semi-inclusive deep inelastic physics Chinese contribution Dedicated Møller Experiment (successor to SLAC E158) DOE MIE proposal → Physics Review

20. 20 sin 2  W

21. 21 New: Search for a Heavy Photon Search for new forces mediated by ~100 MeV vector boson A’ with weak coupling to electrons e+e+ (“dark photon”) small coupling e-e- g’ A’ Motivated by dark matter anomalies: excess of 10-100 GeV e + flux found by PAMELA satellite (Nature 2009, 1 citation/day) excess of few-100 GeV e + + e - flux by Fermi satellite/HESS But- no excess of anti-protons observed! - observed annihilation rate is large!  Suggests M A’ < 1 GeV  decay to protons kinematically forbidden Irrespective of anomalies: New ~GeV–scale force carriers are important category of physics beyond the SM Fixed-target experiments @JLab (FEL + CEBAF) have unique capability to explore this! g – 2 preferred!

22. 22 Jefferson lab 12 GeV Upgrade Physics Program is Compelling and is Expanding

23. 23 CIVIL CONSTRUCTION – Central Helium Liquefier (CHL) #2

24. 24 Hall D Status – Dec. 2010 Ready For Equipment (RFE) Dec. 28, 2010

25. 25 Accelerator Construction Highlights

26. 26 12 GeV Upgrade – Cryomodule Cavity String January 4, 2011

27. 27 Physics Equipment Construction

28. 28 Hall D Detectors Barrel Calorimeter Sixteenth Production Module The Mighty BCAL Press First BCAL Modules Arrive! Preparing Solenoid Test Central Drift Chamber Endplates

29. 29 Jefferson Lab 12 GeV Upgrade An exciting scientific opportunity  Explore the physical origins of quark confinement (GlueX)  New access to the spin and flavor structure of the proton and neutron  Reveal the quark/gluon structure of nuclei  Potential new physics through high precision tests of the Standard Model Strong User community involvement  NSF MRI and NSERC funding to universities for detector elements  Strong international collaborations and contributions  45 PAC-approved experiments – ranking in progress Accel-Civil-Physics scope leverages the existing facility Construction is well underway ! New Proposals and collaborations are welcome

30. 30 Conclusion Jefferson Lab continues to function well The12 GeV Upgrade Project is making enormous progress Thus far there has been strong support for the 12 GeV Ugrade Project from the President, from Congress, DOE, NSF and International Funding Agencies Look for the continuation of that support.